Cylinder 3 misfire at low revs

[His Dudeness]

I have just started on full choke which was not as easy as starting without any. 3 exhaust got hot but not as quickly as the others. When I took choke off, the engine stopped. I then went for a ride. All four smooth for several miles. Short stop at junction OK. Another slightly longer stop at lights where I let it idle  30 seconds and down to 3 and lumpy at low revs all the way home.


My bike don't like red lights. How does it know ?

That proves it then. It's not getting enough fuel through the idle circuit. It's running on the choke circuit but not on the idle circuit. I think you will have to clean the carbs again. Before you do that have you tried turning up the idle speed screw up a bit? It might just be too low.